From b90dafff1bf342d34d539098013d0b9f318c7641 Mon Sep 17 00:00:00 2001
From: Andrew Sukach <andrew@sukach.org>
Date: Fri, 12 Sep 2025 21:53:31 -0700
Subject: [PATCH] `setup.py`: fix version parsing on Python 3.14 (ast.Str
 removed)

Python 3.14 removes the ast.Str node type. String literals now appear
as ast.Constant(value=str).
Update the AST check to accept both ast.Str (for older Pythons) and
ast.Constant with a string value (for Python 3.8+), allowing html5lib to
build successfully on Python 3.14 while remaining compatible with older
version.

Upstream: https://github.com/html5lib/html5lib-python/pull/589

Signed-off-by: Bernd Kuhls <bernd@kuhls.net>
---
 setup.py | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/setup.py b/setup.py
index 30ee0575..42ab6f67 100644
--- a/setup.py
+++ b/setup.py
@@ -92,9 +92,14 @@ def default_environment():
     for a in assignments:
         if (len(a.targets) == 1 and
                 isinstance(a.targets[0], ast.Name) and
-                a.targets[0].id == "__version__" and
-                isinstance(a.value, ast.Str)):
-            version = a.value.s
+                a.targets[0].id == "__version__"):
+            if hasattr(ast, "Str") and isinstance(a.value, ast.Str):
+                version = a.value.s
+            elif (hasattr(ast, "Constant")
+                  and isinstance(a.value, ast.Constant)
+                  and isinstance(a.value.value, str)):
+                version = a.value.value
+assert version is not None
 
 setup(name='html5lib',
       version=version,